@misc{indiciae4b1d787a4dd7,
  title = {Light direction from shad(ow)ed random Gaussian surfaces.},
  author = {Jan J Koenderink and Andrea J van Doorn and Sylvia C Pont},
  year = {2004},
  doi = {10.1068/p5287},
  url = {https://pubmed.ncbi.nlm.nih.gov/15729909/},
  note = {Source identifier: 15729909}
}